Blower



C. G. BUDER BLOWER Dec. 28 1926.

Patented Dec. 28, 1926.

narran STATES 1,612,568 PATENT orrice.

HABILES G. BDER, OF ST.' LOUIS, MTSSOURI, VASSIGNOR TO LANGE'NBERG MANUFAC- TURING CO., OF ST. LOUIS, MISSOUR, A

CORPORATON F `IVIISSOURT BLOWER.

Application Ied August 21, 1925. Serial No. 517544.

This invention relates to improvements in blowers, and has special reference to mechanism for forcing air into the outer casing of a furnace.

An ob'ect of the invention is to rovide of curved blades by which the desired re.

cults are obtained in a more etiicient and satisfactory manner.

Other objects of the invention will be apparent from the following description taken in connection with the accompanying drawing, in which- Fig. 1 is a plan view of the mechanism, parts of the fan casing being broken away showing the fans therein.

Fig. 2 is an end elevation with parts of the fan casing broken away and in section.

Fig. 3 is an inner side elevation, a part of the casing and one of the fans beingvin section.

Fig. l is an enlarged sectional view of a portion of one of the fans showing the form of blades.

The invention is shown in connection with a casing l to which the end, top and bottom walls of a fan casing 2 are attached. The fan casing also comprises a wall 3 having its lower inner edge in connection with the casing 1. The wall 3 extends outwardly from the cas'- ing 1 between the end walls of the casing 2 and curves upwardly, inwardly and downwardly on a spiral (Fig. 2) having its upper edge 4 in a plane approximately two-thirds of the distance from the lowest portion of said wall 3 to the highest portion thereof, and provided with a flange 5 extending obliquely upwardly into the casing 1. This construction provides al passage G from the fan casing` to the casing 1 through which the air is driven by the mechanism.

A feature of the invention comprises the relationship of the parts forming the passage 6 to the casing 1. The part of the casing 1 shown is arcuate in cross section and the lower end of the wall 3 and the upper terminal portions 4 5 thereof extendinto and transversely of the casing 1. The casing l is of greater height than the vertical width of the passage 6 and is filled with air. The construction in which the terminal portions 1 -5 extend into and transversely of the casing provides a battle preventing the air from being drawn downwardly and under the edge a into the fan casing at the top of the passage This result is highly benedcial when the invention is used in connection with a hot air furnace since the result obtained is that all of the air is driven into the casing 1 and forced upwardly therein. The fiange 5 serves as a baffle preventing suction of the air into the fan casing.

Each end wall of the casing 2 is shown as provided with an opening therethrough surrounded by an inwardly extended pipe coniprising a conically sloping wall 7 and a tubular extension 8 on its inner end. The wall structure 7-8 may be formed integral with the end wall of the casing 2, or not, as desired. f

A support 9 is in connection with each end wall of the casing 2. A shaft 10 extends through the casing 2 and is journaled in bearings 11 upon the supports 9.` One end of the shaft l0 is provided with a pulley 12 engaged by a belt 13 driven by the shaft 14 of the motor 15 shown as mounted upon the casing 2. The shaft 10 is in a plane slightly below the plane of the lower edge 4 of the wall 3, so that the fan devices supported by said shaft will drive the air from the fan casing through the passage 6 into the cas ing 1.

As shown, each of the fans on the shaft 10 comprises at its inner end a disc 16 to which the inner ends of the annular' series of blades 17 are rigidly connected, while the outer ends of each series of blades 1.7 are rigidly Yconnected with a ring 18 encircling the adjacent tubular part 8 of the air inlet passage. Each of the discs 16 has a hub element 19, the same forming rigid connection between the discs and the shaft 10 so that the shaft will rotate the fans.

The blades 17 are curved transversely of their length and are spaced to provide passages for the discharge of the air entering the fan structure through the air passages 7. Looking at Fig. 2 the fans are arranged to rotate in a countercloclwise direction.

lill

Con'nnercial use of the invention has deinonstrated its practicability and efliciency, the beneficial results being obtained because of the novel construction, relationship and inode of operation of the devices comprising the invention. I do not restrict myself to specific or unessential features, but what I claim and desire to secure by Letters Patent is l. In a furnace, a Vertical furnace casing having an opening therein, Aa pair of lower casing vertical end walls attached to said furnace casing at :the sides of said opening, a spiral wall between said end walls having its lower edge extending into the bottoni of said opening and having its upper edge extei'iding into said opening` in a plane interinediate of the axis and the top of said spiral wall leaving an opening for the passage of air into said furnace casing, a flange extending from said upper edge upwardly into said furnace casing and terminating approximately 'in vertical ali'neinent with the lower edge of said spiral wall, and a blower enclosed by said spiral wall and being mounted Yfor rotation on a horizontal axis which is below the plane of the upper edge of said spiral wall. e

2. In a furnace, a vertical furnace casing having anv opening therein, a pair of lower casing `vertical end walls attached vto said furnace casing at the sides of said opening, a spiral wall between said end walls having its lower edge extending into the bottoni of said opening and having its upper edge eX- tending into said opening in a plane interi'nedia'te of theaxi's and the top o'fsaid spiral wall leaving an opening for the passage 'of air linto said furnace casing, a flange extending from said upper edge upwardly in- 'to said furnace casing and terminating approximately in vertical alineinen't with the lower ledge of said spiral wall, a blower enclosedby'said spiral wall and being mounted for rotation on a ho'rizo'n'tal axis which is l'below the '-pl'a'ne of the upper edge of said spiral wall, :and ineans for 'rotating said 'blower in a direction in which 'the side of said blower that is toward said opening rnores upwardly.

CHARLES Gr. BUDER. 

